What is the easiest motor 400EX

[HB416EX]

What is the easiest fit into a 400EX.Any info is appreciated.

[YZ400EX]

YZ 400, 426 or 450 is by far the easiest motor to mount up in the frame.. If you need any help let me know..

Like what all do you have to modify

[ss440ex]

Originally posted by HB416EX
What is the easiest fit into a 400EX.Any info is appreciated.

Simple...the one that came out!! LOL

Originally posted by EXking
Like what all do you have to modify

All i did was make front motor mounts and have 2 mounts welded on and the kicker extended and thats about it.

the radiator needs mounts made for it.

[markvette]

front mounts have to be made or can buy them from a member here. lower motor mounts, head stay mount. bushing for the motor as the hole in the motor is bigger than the pivot bolt through the swing arm, spacer for one side of swing arm between motor and swing arm, radiator mounts, custom oil tank and mounts, custom air box is best. kicker extension which can be built with stock yamaha parts no need to spend 200 bucks on a custom one. about it

Mark

[PismoLocal]

Does the yz450 bolt up just as easy?

[ss440ex]

Originally posted by PismoLocal
Does the yz450 bolt up just as easy?

Yes!!
Only differance is the lower engine mount sets aft about .400 then the yz426.

[JPhonda]

ok i hear about people putting in yz400 motors in their ex. Is this a big difference then the stock ex motor, or do people mainly do it for the liquid cooling.

[YZ400EX]

Originally posted by JPhonda
ok i hear about people putting in yz400 motors in their ex. Is this a big difference then the stock ex motor, or do people mainly do it for the liquid cooling.

HUGE difference.. undescribable difference..